Mac环境下安装Ruby

使用rvm来安装ruby

step1

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$ curl -L get.rvm.io | bash -s stable

step2

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$ source ~/.bashrc $ source ~/.bash_profile$ rvm -v  
$ source ~/.bash_profile  
$ rvm -v

step3

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$ rvm list known

step4

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$ rvm install 2.2.0

如果Step4失败，可以进行如下尝试

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sudo chown -R $(whoami):admin /usr/local
cd /usr/local
git remote set-url origin git://mirrors.ustc.edu.cn/brew.git
brew update
sudo chown root:wheel /usr/local
rvm install 2.2.0